A teacher has been stabbed at a Bradford school and a pupil is being hunted by detectives.
The male teacher, 50, was attacked at Dixons Kings Academy at 08:55 BST, police said.
He has been taken to hospital where his condition has been described as stable.
West Yorkshire Police are searching for a boy, 14, in connection with the attack. He is described as Asian, with short dark hair and was last seen wearing a blue uniform blazer.
Det Supt Simon Atkinson said: "We are conducting enquiries in the area to locate a suspect and I would like to reassure residents and staff that all necessary resources are being deployed to investigate this ongoing and clearly very serious incident."
A spokeswoman for the force said a "considerable" search was under way.
'Desperately sad'
He added there was no ongoing risk to pupils or staff at the school.
In a statement on its website, the school said it was continuing to operate as normal and staff were working with police.
Ian Murch, from the Bradford branch of the National Union of Teachers (NUT), described the situation as "difficult."
-bbc
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